Literature DB >> 9302282

A metalloradical mechanism for the generation of oxygen from water in photosynthesis.

C W Hoganson1, G T Babcock.   

Abstract

In plants and algae, photosystem II uses light energy to oxidize water to oxygen at a metalloradical site that comprises a tetranuclear manganese cluster and a tyrosyl radical. A model is proposed whereby the tyrosyl radical functions by abstracting hydrogen atoms from substrate water bound as terminal ligands to two of the four manganese ions. Molecular oxygen is produced in the final step in which hydrogen atom transfer and oxygen-oxygen bond formation occur together in a concerted reaction. This mechanism establishes clear analogies between photosynthetic water oxidation and amino acid radical function in other enzymatic reactions.

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Year:  1997        PMID： 9302282     DOI： 10.1126/science.277.5334.1953

Source DB:  PubMed          Journal:  Science        ISSN： 0036-8075            Impact factor:   47.728


  70 in total

1.  The mechanism for proton-coupled electron transfer from tyrosine in a model complex and comparisons with Y(Z) oxidation in photosystem II.

Authors:  Martin Sjödin; Stenbjörn Styring; Björn Akermark; Licheng Sun; Leif Hammarström
Journal:  Philos Trans R Soc Lond B Biol Sci       Date:  2002-10-29       Impact factor: 6.237

Review 2.  Photosystem II and photosynthetic oxidation of water: an overview.

Authors:  Charilaos Goussias; Alain Boussac; A William Rutherford
Journal:  Philos Trans R Soc Lond B Biol Sci       Date:  2002-10-29       Impact factor: 6.237

3.  Resolving intermediates in biological proton-coupled electron transfer: a tyrosyl radical prior to proton movement.

Authors:  Peter Faller; Charilaos Goussias; A William Rutherford; Sun Un
Journal:  Proc Natl Acad Sci U S A       Date:  2003-07-10       Impact factor: 11.205

4.  Kinetics of proton-coupled electron-transfer reactions to the manganese-oxo "cubane" complexes containing the Mn4O4(6+) and Mn4O4(7+) core types.

Authors:  Marcelino Maneiro; Wolfgang F Ruettinger; Emilie Bourles; George L McLendon; G Charles Dismukes
Journal:  Proc Natl Acad Sci U S A       Date:  2003-03-18       Impact factor: 11.205

5.  Evidence for spontaneous structural changes in a dark-adapted state of photosystem II.

Authors:  Kelly M Halverson; Bridgette A Barry
Journal:  Biophys J       Date:  2003-10       Impact factor: 4.033

Review 6.  The evolutionary pathway from anoxygenic to oxygenic photosynthesis examined by comparison of the properties of photosystem II and bacterial reaction centers.

Authors:  J P Allen; J C Williams
Journal:  Photosynth Res       Date:  2010-05-07       Impact factor: 3.573

Review 7.  Proton-coupled electron transfer in DNA on formation of radiation-produced ion radicals.

Authors:  Anil Kumar; Michael D Sevilla
Journal:  Chem Rev       Date:  2010-05-05       Impact factor: 60.622

8.  Structural Change of the Mn Cluster during the S2→S3 State Transition of the Oxygen-Evolving Complex of Photosystem II. Does It Reflect the Onset of Water/Substrate Oxidation? Determination by Mn X-ray Absorption Spectroscopy.

Authors:  Wenchuan Liang; Theo A Roelofs; Roehl M Cinco; Annette Rompel; Matthew J Latimer; Wa O Yu; Kenneth Sauer; Melvin P Klein; Vittal K Yachandra
Journal:  J Am Chem Soc       Date:  2000-04-12       Impact factor: 15.419

9.  Functional Models for the Oxygen-Evolving Complex of Photosystem II.

Authors:  Clyde W Cady; Robert H Crabtree; Gary W Brudvig
Journal:  Coord Chem Rev       Date:  2008-02-01       Impact factor: 22.315

10.  Structural Effects of Calcium Depletion on the Manganese Cluster of Photosystem II: Determination by X-ray Absorption Spectroscopy.

Authors:  Matthew J Latimer; Victoria J DeRose; Vittal K Yachandra; Kenneth Sauer; Melvin P Klein
Journal:  J Phys Chem B       Date:  1998       Impact factor: 2.991
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